Jack



w. BENGEL 7 Jan. 29. 4

JACK

4 TTORNEYS Jan. 29, 1924. 1,481,822

. w.- BENGEL JACK Filed Oct. 7, 1922 2 Sheets-Sheet 2 l I I A TTOH/VEYSPatented Jan. 29, 1924.

UNHED STATES WILLIAM BENGEL, 0F NEVZPORT, ARKANSAS.

JACK. 7

Application filed October 7, 1922. -Se1'i a1 No. 592,954.

gagement of the part or parts to be raised at a point close to theground on which the jack rests, and thus capable of effective use wherethe ordinary jack cannot be employed.

In my improved jack a lever having means at one end to directly engagethe part or' parts to be lifted, works up and down upon an uprightextending vertically from a ground engaging supporting plate, by vir-.

ture of opposing sprlng controlled 'dogs which engage oppositelydisposed ratchet faces of the upright. At the opposite end of the leveris a handle and in addition to its other parts the lever carries a dogreleasing member and an actuating and controlling element for the dogreleasing member whereby the dogs may be forced and held out ofengagement with the ratchets of the upright in order to permit oflowering movement of the lifting lever. My invention also contemplatesthe provision of a lever the dogs of which are so formed as to bringabout binding engagement between the same and the upright when the leverlowers under a weight supported thereby, capable of manual release upondownward pressure upon the handle end of the lever.

In the accompanying drawings which illustrate my present invention andform a part of this specification,

Figure 1 is a perspective view of my improved jack with the handleremoved,

Figure 2 is a detail perspective view of the handle,

Figure 3 is a detail perspective view of one of the dogs,

Figure 4 is a fragmentary side view of a portion of the uprightand thelever, the latter partly broken away and in section,

Figure 5 is a detail perspective view of the dog releasing wedge andportions of the dogs engaged by the wedge, and

Figure 6 is a perspective view of a portion of the lifting lever withthe dogs removed;

Referring now to these figures and particularly to Figure 1, myinvention contemplates a rectangular upright 10 rising from any suitableform of flat base 11 adapted to rest upon the ground or similar support,the opposite edges of which upright are provided with ratchet teeth 12,and the opposite sides of which upright have central longitudinalgrooves 13. j

The lifting lever proposed by my invention is preferably of elongatedform rectangular in cross section as indicated at 14, having at one enda reduced polygonal exten sion '15, the latter adapted to receivethereover the end socket 16 of a handle 17. The opposite end of thislever has a claw shaped extension 18 for direct engagement with the workto be lifted, and its body is provided with a longitudinal slot 19through which the upright 10 extends, and has opposing inwardlyprojecting lugs 20 centrally of the opposite sides ofits slot 19 whichextend into the side grooves 13 of the upright and thus position thelatter centrally of the slot 19 of the lever, these lugs being roundedso that the lever can be rocked up and down on the upright,

Within opposite ends of the slot 19 of the lifting lever 14, a pair oflifting dogs 21 are pivoted upon transverse pivot bolts 22, thesedogshaving reduced engaging extensions 23 projecting below the lever andnormally held in engagement at their lower free ends with the ratchetedges 12 of the upright 10 by virtue of springs 24 whose lower inner freends engage the lower portions of the dogs and whose upper outer endsare fixed to the body of the lifting lug by screws or like anchoringmembers 25, adjacent to opposite ends of the lever slot 19. With theparts as thus far described it is obvious that upon association of thehandle 17 with the handle receiving end of the lever 14, the latter maybe oscillated vertically and will mount the upright 10 so that duringsuch oscillation the latter will force vertically shifting movement ofthe lever.

In releasing the lifting lever for downward movement on the upright itis obvious some means must-be provided for disengaging the dogs 28 fromthe upright ratchets. To do this I provide a vertically shiftable dogreleasing member whose lower portion is in the nature of a dog engagingspreader 26 and whose upper reduced shank 27 is slidable along one sideof the body of the lifting lever and has a laterally outstanding pinprojecting through the arcuate slot oi a control lever 25 fulcrumed upona pivot bolt laterally outstanding from one side of the body of thelifting lever and havat its opposite end a handle 32. Thus the lower wege shaped head 26 oi this releasing member is, upon downward move- 2 ofthe member forced to spread the er portions of the dogs 21 apart. Thiswedginu head engages the dogs by virtue of lat-era lly outstandingangular extensions 33 at the low t-r ends of the dogs, and is heldcentralized between the dogs at all times by virtue o t its inwardlyprojecting vertical rib 3e wl .Ctll extends into and is movable withinone of the side grooves 13 oi": the upright 10.

it will be observed that the upper portions of the dogs 21 inwardlybeyond their pivots 22, have convexly rounded upright engaging surfacesso disposed as to come into c't-ion when, after downward movement of tle dog releasing member, the lifting lever lowers on the upright under aweight as for instance the work upon its work engaging end 18. It isobvious that under such circumstances the work engaging end will bedepressed below the handle, end of the lever and thus the rounded upperinner portions of the dogs will come into binding engagement with theratchet edges of the lever so as to act as a check against too rapidlowering movement, which binding engagement may be released in whole orin part bymanual pressure of the operator downwardly upon the handle endof the lever.

It is also obvious that by virtue of this construction and arrangementof" parts the lifting lever including its work engaging end, may belowered to and against the flat supporting base 11 and may engage workat a level but slightly above that of the sup porting surface on whichthe jack as a whole rests. By the use of an elongated handle 17 and byvirtue of the close proximity of the work engaging end of the lever tothe upright, considerable leverage may be eX- erted in the lifting ofthe work, and it is equally obvious that instantaneous release may beeffected when it is desired to permit the work to be again lowere Iclaim:

1. A jack including an upright having a supporting base and oppositeratchet faces,

a lever slidably guided on the upright and oscillatable with respectthereto, said lever being directly engageable with the work at one endand having an opposite handle end, spring controlled dogs pivotallysupported by the lever and having depending portions engaging theratchet faces of the upright, and a member carried by and shiitable withthe lever and movable between and in engagement with the engagingportions of said dogs to force the latter out of engagement with theratclvt :faces of the said upright.

2. A jack including an upright having a supporting base and oppositeratchet faces, a lever slidably guided on the upright and oscillatablewith respect hereto, said lever being directlyvengageable with the workat one end and having an opposite handle end, spring controlled dogspivotally supported by the lever and having depending portions engagingthe ratchet races of the upright,

and .a member carried by and shiftable with the lever and movablebetween and in engagement with the engaging portions of said dogs toforce thelatter out of engagement with the ratchet faces of the saidupright, said dogs having upper inner convexly rounded surfaces oppositetheir pivots, normally spaced from the adjacent faces of the upright andmovable into binding engage ment with the latter upon tilting of thelever with respect to the upright.

3, A jack including an upright having a supporting base and oppositeratchet faces, a lever slidably guided on the upright and oscillatablewith respect thereto, said lever being directly engageable with the workat one end and having an opposite handle end, and opposing springcontrolled dogs carried by the lever and engaging the opposite ratchetfaces of the upright, said dogs having laterally projecting angularextensions at their lower engagin ends, a wedge member vertically.shiftabie at one side of the lever engageable with the said extensionsof the dogs to force the latter out of engagement with the ratchet racesof the upright, and a controlling and actuating lever for the said wedgetulcrumed upon the adjacent side of the lifting lever and operativ-elyconnected to the wedge as described.

' VILLIAM BENGEL.

